document.write( "Question 449181: Can someone please show me step by step how to solve this problem using matrices? I’m missing something somewhere, Thanx.
\n" ); document.write( "x – y + 4z = 6
\n" ); document.write( "2x + z = 1
\n" ); document.write( "x +5y + z = -9
\n" ); document.write( " \n" ); document.write( "
Algebra.Com's Answer #309043 by stanbon(75887)\"\" \"About 
You can put this solution on YOUR website!
Can someone please show me step by step how to solve this problem using matrices? I’m missing something somewhere, Thanx.
\n" ); document.write( "x – y + 4z = 6
\n" ); document.write( "2x + z = 1
\n" ); document.write( "x +5y + z = -9\r
\n" ); document.write( "\n" ); document.write( "------------------------
\n" ); document.write( "Form the matrix:
\n" ); document.write( "1..-1...4
\n" ); document.write( "2...0...1
\n" ); document.write( "1...5...1
\n" ); document.write( "-----------------
\n" ); document.write( "Find it's inverse:
\n" ); document.write( "The foll0wing is multiplied by 1/36
\n" ); document.write( "-5....21....-1
\n" ); document.write( "-1....-3.....7
\n" ); document.write( "30....-6.....2
\n" ); document.write( "======================
\n" ); document.write( "Multiply the inverse times the
\n" ); document.write( "column matrix [6....1.....-9] to get
\n" ); document.write( "x = 0
\n" ); document.write( "y = -2
\n" ); document.write( "z = 1
\n" ); document.write( "===================
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "============ \n" ); document.write( "
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